What did the miller-urey experiment demonstrate?

a. earths early atmosphere contained abundant oxygen
b. early earth was constantly bombarded with comets.
c. small organic molecules formed from gas mixture of earth's early atmosphere.
d. organisms were spontaneously generated on early earth.

Option C

Explanation:

Miller and Urey performed an experiment, using some inorganic molecules such as water, methane, carbon dioxide and hydrogen in laboratories conditions similar to early earth conditions .

Amino acids molecules formed as the result of this experiment, this proved that small organic molecules such as amino acids are formed from inorganic molecules.

Hence, the correct answer is option C  

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